Parent taxon: Caenogastropoda according to P. Bouchet et al. 2017
See also Beesley 1998, Bouchet et al. 2005, Harzhauser 2004, Harzhauser 2007 and Lozouet et al. 2001
Sister taxa: Architaenioglossa, Carinomphalus, Cassianozyga, Cataldia, Cerithimorpha, Cerithioidea, Coelodiscidae, Coelostylinidae, Cyclophoracea, Dendropupoidea, Dzikella, Epitonioidea, Idahospira, Littorinimorpha, Loxotomella, Meekospiridae, Mesogastropoda, Neontaenioglossa, Neotaenioglossa, Orthonematoidea, Palaeostyloidea, Peruneloidea, Perunelomorpha, Pragoscutulidae, Prisconatica, Pseudomelanoidea, Soleniscoidea, Spanionematidae, Strobeidae, Trinema, Vanikoroidea, Ventrosia, Zygopleuroidea
Subtaxa: Acteoninoidea Campanilimorpha Cerithiimorpha Hypsogastropoda Prisciphoridae